Which of the following particles, is unstable?
1. Proton
2. Neutron
3. Electron
4. Antineutrino
Subtopic:  Nucleus |
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Choose the incorrect statements regarding binding energy per nucleon:
1. Binding energy per nucleon is practically constant for nuclei with mass numbers between \(30\) and \(170\).
2. Binding energy per nucleon is maximum for \(_{56}\mathrm{Fe}\) (equal to \(8.75~\text{MeV}\)).
3. Binding energy per nucleon for \(_{6}\mathrm{Li}\) is lower compared to \(_{4}\mathrm{He}\).
4. Higher the binding energy per nucleon, the more unstable is the nucleus.
Subtopic:  Nuclear Binding Energy |
 74%
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Of the radiations/particle beams mentioned below, which one causes maximum ionisation when passing through matter?
1. neutron beam
2. \(\beta\)-rays
3. \(\gamma \)-rays
4. infra-red light
Subtopic:  Types of Decay |
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Given below are two statements: 
Assertion (A): The density of the nucleus is much higher than that of ordinary matter.
Reason (R): Most of the mass of the atom is concentrated in the nucleus while the size of this nucleus is almost \(10^5\) times smaller.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Nucleus |
 66%
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In a nuclear reaction the following quantities is/are conserved:
1. kinetic energy 2. mass
3. momentum 4. all the above
Subtopic:  Mass-Energy Equivalent |
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In an exoergic nuclear reaction (i.e. energy is released in the reaction), let
1. \(E_1\): total binding energy of initial nuclei
2. \(E_2\): total binding energy of final nuclei
3. \(A_1\): total number of nucleons of initial nuclei
4. \(A_2\): total number of nucleons of final nuclei
Then:
1. \(E_1>E_2\)
2. \(E_2>E_1\)
3. \(E_1=E_2\)
4. \(\dfrac{E_1}{A_1}=\dfrac{E_2}{A_2}\)
Subtopic:  Nuclear Binding Energy |
 52%
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The nuclear radius of which of the following nuclei is approximately twice that of deuterium \((_1\mathrm{H}^2)\)?
1. \(_2\mathrm{He}^4\) 2. \(_3\mathrm{Li}^8\)
3. \(_4\mathrm{Be}^8\) 4. \(_8\mathrm{O}^{16}\)
Subtopic:  Nucleus |
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During a \(\beta\)-decay, fast electrons are found to have been emitted. These electrons come from:
1. the outermost atomic shell
2. the innermost atomic shell
3. the conduction band
4. the nucleus
Subtopic:  Types of Decay |
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In a nuclear reaction (involving atomic nuclei only), the sum of kinetic energies of the product nuclei was found to be greater than that of the reactants. This means that:
1. some nucleons are created
2. some nucleons are destroyed
3. energy is converted into mass
4. mass is converted into energy
Subtopic:  Mass-Energy Equivalent |
 65%
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A nuclear reaction occurs where a nucleus \(X\) breaks up into two separated nuclei \(Y\) and \(Z\text:~~~~X\longrightarrow Y+Z\)
Let, the nuclear radii of \(X,Y,Z\) be \(r_{_X},r_{_Y},r_{_Z}.\) Then, which of the following, is (nearly) correct?
1. \(r_{_X}=r_{_Y}+r_{_Z}\) 2. \(\Large\frac{1}{r_{_X}}=\frac{1}{r_{_Y}}+\frac{1}{r_{_Z}}\)
3. \(r_{_X}=|r_{_Y}-r_{_Z}|\) 4. \(r_{_X}^3=r^3_{_Y}+r^3_{_Z}\)
Subtopic:  Nucleus |
 68%
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